diff --git a/files/kojibuilder/koji.conf b/files/kojibuilder/koji.conf
index 47f833d7d8..36eafe9924 100644
--- a/files/kojibuilder/koji.conf
+++ b/files/kojibuilder/koji.conf
@@ -8,10 +8,18 @@ server = http://koji.fedoraproject.org/kojihub
 ;url of web interface
 weburl = http://koji.fedoraproject.org/koji
 
+;url of package download site
+topurl = http://kojipkgs.fedoraproject.org/
+
 ;path to the koji top directory
 ;topdir = /mnt/koji
 
-;configuration for SSL athentication
+;configuration for Kerberos authentication
+
+;the service name of the principal being used by the hub
+;krbservice = host
+
+;configuration for SSL authentication
 
 ;client certificate
 cert = ~/.fedora.cert